Apple IIc - use of NTSC machine min 240v / 50hz-land, have screen issues
So I have my nice Apple iic, bought in canada - 110v, 60hz printed on the psu and monitor. But I'm now in the UK.
I'm running it via my trusty stepdown transformer, which outputs 110v but naturally still at 50hz.
The iic seems to run perfectly, but the iic monitor - and i have a spare that does exactly the same - displays fine, all readable but is displayed with a rather neat constant and regular 'wobble', which I assume is the 60hz circuitry having a bit of an issue coping with 50hz.
my questions are, please:
a are there any internal adjustments possible on the iic monitor that may help hide this screen wobble?
b are there any mods anyone's aware of that can get rid of this?
cheers in advance for any help or advice!